Airport surface detection equipment (asde)

Details Airport surface detection equipment (asde) Airport surface detection equipment (asde)

G - Physics

01

S

343/12, 351/53

G01S 7/34 (2006.01) H01Q 19/12 (2006.01) C08G 63/08 (2006.01)

Patent

CA 1106476

Abstract The invention relates to an ASDE radar to supply information on airport surface traffic. A well-known ASDE radar comprises an antenna having an elevation-depending gain factor Image , for .omega.1<.omega.<.omega.2, where .omega.1, .omega. and .omega.2 represent angles of depression. In case of the above radar the echo power of an airport surface target is independent of the distance, whereas the echo power of rain clutter is inversely proportional to the square of the distance. Consequently, a remote surface target still pro- jected on the radar screen above the rain clutter, is likely to disappear in the rain clutter when approaching the radar; this may incur fatal consequences. To solve the above problem, the ASDE radar of the invention comprises a combination of an antenna having a gain factor Image , and a sensitivity time control circuit in its receiver.

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